Question about Hayward H-series Electronic Gas Pool Heater H300

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The pilot light keeps gooing out and heater constantly shuts off

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Sounds like you need a new thermalcoupling

Posted on Aug 02, 2009

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Any idea why my Atwood water heater will shut the main burner and the pilot light off at the same time? Sometimes runs for 20 minutes, sometimes 2. I hear a clicking sound, then they both shut off.


The thermostat shuts off the main burner.The pilot light gas is controlled by the thermocouple which the side of the pilot flame has to envelop. If the flame is too small or too far away from the flame, it shuts the gas off to the pilot. The thermocouple generates a small voltage which keeps the pilot gas open. It can over time fail itself, so look at replacing it. The thermostat sounds like it's failing too.

Apr 27, 2016 | Water Water Heaters

1 Answer

My wall heater is a williams gas wall heater and I just had a question is the pilot always suspose to be lit the main is not lit but when it is off there Is still a flame that's on Ithink its the pilot is...


All gas appliances have a constant on pilot light.This keeps you from having to light it everytime it goes on. The pilot flame is small, and usually mostly blue in color. If there is any yellow or orange color in the flame then the jet is dirty, which can cause a malfunction ( just thinking this could be handy to know!).
Thanks for using Fixya!!

Nov 09, 2013 | Heating & Cooling

1 Answer

What would cause the pilot light on a gas heater to keep gooing out


Make sure you have a clean and strong pilot light. Take a rubber tube and blow the pilot head to make sure something didn't partially block your pilot when it was off reducing the heat to the thermocouple or thermopile.

Dec 31, 2012 | Desa International Heating & Cooling

1 Answer

Pilot light keeps going out


pilot light keeps going out! more then likely its the thermal coupling doing this. if bad it shut all gas to heater for a safety measure. just shut power off, then turn gas off and replace it. then you should be ready to go. to relight heater hold down on gas vavle knob in the pilot position, hold down and light it at the coupling where gas comes out. when it is lit, continue to hold down for 60 seconds. release knob very slow. then if its lit, turn to the run position. if flme goes out, wait at least 5 minutes to expel the gas fumes and turn to pilot and try again. good-day !

Mar 31, 2012 | Water Heaters

1 Answer

Our pilot light does not stay on...sometimes when temperature changes out side


The pilot light has a thermocouple that allows gas to the pilot light while the flame is burning. If flame goes out it shuts gas off to the pilot jet. It seems that your thermocouple is faulty and needs to be replaced if pilot light keeps going out as the outside air cools.

Sep 21, 2010 | Bosch AquaStar 125FXKIT-NG 125FX Natural...

1 Answer

My pro comp heater will light the pilot but will not light the heater. It just sparks attempting to light, after a while it will shut off completely.


Could be your thermocouple. The spark should light the pilot and the pilot lights the main burner but if the thermocouple doesn't pick up the heat from the pilot the igniter will keep trying to light it until it times out and shuts off to prevent gas buildup.

Mar 10, 2010 | Procom MN300EPC Heater

1 Answer

Pilot shuts off a williams wall unit thermostat is new is electronic and batteries are new and replaced constantly and pilot continues to shut off what is the problem?


You probably have a failing thermocouple. It is the small probe in the pilot light and you can get a replacement at any good hardware store or farm center.

Dec 28, 2009 | Williams Heating & Cooling

1 Answer

Water wizard 10P pilot light keeps going out


If the thermocoupler is defective the gas to everything is shut off. The coupler is the bulb that sits ib the pilot flame If it doesn't heat up it will sense no pilot and shut the gas off. They don't cost much and are easy to change. Good Luck, Ned

Sep 17, 2009 | Bosch & Tankless LP Hot Water Heater

1 Answer

Dayton Furnace - Pilot Light Goes Out but Fan keeps running?


Pilot lighted furnaces have a thermocouple made from disasimilar metals that when heated create electricity to actuate a relay that alows the gas to flow to the furnace.

When the thermocouple gets coated with carbon from the pilot lights constant burning it acts as an insulator and keeps the thermocouple from getting enough heat to generate electricity, a very good safety factor.

What you have to do is locate the thermocouple it should be located over the pilot light, you will see a gray substance around the thermocouple it will be hard like cement, take a knife and scrape away as much of the gray material as possible then sand the themocouple with a medium sandpaper until it shines, use one of you wifes emery boards, this should solve your problem.

Feb 24, 2009 | Dayton (4LX41) Heater

2 Answers

My glo-warm propane heater keeps shutting off automatically-pilot and all.


my heater says if the pilot light keeps going off automatically it is a safety function that means it does not have enough fresh air to operate

Nov 03, 2008 | Desa International Blower Glow Warm Wall...

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